Hello Matt Consider the area you will be diving, Strong currents or overhead enviroment with line.I dove with many diffrent types of Split fins in strong current,pools,Reefs,etc i can over kick the fin and loose power but for drift diving they can be nice.Some fins are stiffer than others. in strong current one with stiffer rails on the sides will respond better.I dive the Jet with Hal Spring Heel and I get great power and easy kicking. Good luck with the search SFUE Diver